Large-eddy simulation of correlation moments in turbulent combustion and validation of the RANS-SOM combustion model

被引：12
|
作者：
Wang, F [1 ]
Zhou, LX [1 ]
Xu, CX [1 ]
机构：
[1] Tsinghua Univ, Sch Aerosp, Dept Engn Mech, Beijing 100084, Peoples R China
来源：
FUEL | 2006年 / 85卷 / 09期
关键词：
turbulent combustion; large-eddy simulation; correlation moments;
D O I：
10.1016/j.fuel.2005.11.006
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The three-dimensional large-eddy simulation (LES) is carried out for a piloted methane-air jet flame (Flame C), measured in Sandia National Laboratory, and its statistical results are validated by experimental data. The LES statistically-averaged tirne-averaged temperature, the root mean square (RMS) value of temperature, and time-averaged methane and oxygen concentration are compared with those obtained using the Reynolds-averaged Navier-Stokes (RANS) equations with second-order moment (SOM) combustion model. Also, the cross-correlations in the time-averaged reaction rate expression of SOM model are given by the LES statistics. It is found that there is a similarity between the distribution of the correlation moments and the distribution of the products of corresponding averaged variable's gradients, the closure assumptions made in the algebraic second-order moment (ASOM) combustion model for RANS model is approximately valid. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1242 / 1247
页数：6
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